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CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) shares in Thousands, $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Statement of Financial Position [Abstract] |  |
Available-for-sale securities, allowance for credit loss | $ 558 | $ 566
Available for sale debt securities, amortized cost | 1,337,397 | 1,162,919
Equity securities, amortized cost | 79,917 | 91,052
Other investments, as fair value | $ 4,794 | $ 4,794
Cumulative convertible preferred stock, par value (in USD per share) | $ 0.01 | $ 0.01
Cumulative convertible preferred stock, shares authorized (in shares) | 1,000 | 1,000
Cumulative convertible preferred stock, shares issued (in shares) | 10 | 10
Cumulative convertible preferred stock, shares outstanding (in shares) | 10 | 10
Cumulative convertible preferred stock, minimum liquidation preference (in USD per share) | $ 9.99 | $ 9.99
Common stock, par value (in USD per share) | $ 0.01 | $ 0.01
Common stock, shares authorized (in shares) | 55,000 | 55,000
Common stock, shares issued (in shares) | 47,298 | 47,269
Common stock, shares outstanding (in shares) | 28,286 | 28,966
Treasury stock, shares (in shares) | 19,012 | 18,303

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